(1)=UPPER TEETH.=--For the removal of teeth in the maxilla the patient
should be placed at such a level that the arm of the operator can, if
necessary, embrace the head of the patient with comfort. The operator
should stand at the right side of the patient, and slightly in front,
the first finger and thumb being placed on either side of the alveolus
(fig. 16). In the event of the patient becoming restless, the arm should
be shifted so as to encircle the head and hold it firmly.
(_a_) =Upper Incisors.=--The roots of both the upper central and lateral
incisors are usually cone shaped, the anterior surface being the arc of
a greater circle than that of the posterior. Forceps for the removal of
these teeth ought therefore to have the blades made in a corresponding
manner (see fig. 17). The lateral incisor is smaller than the central,
and has at times a root somewhat flattened. In removing upper incisors
the posterior blade is applied first, care being taken to
[Illustration: FIG. 16.]
see that the edge of the instrument passes between the gum and the
tooth. To dislodge these teeth a firm inward movement should be made in
a direction towards the palate, this movement being followed by one in
an outward direction. If this fails to dislodge the tooth from its
attachments, a firm rotary motion, first to the right and then to the
left, may be tried (the amount of rotation necessary being only about an
eighth of the circle represented by the circumference of the root).
Rotation is generally recommended in the first instance for the
extraction of these teeth, but the inward movement is, I think, best,
the teeth yielding more readily and with less laceration of the soft
tissues.
The extraction of the roots of these teeth does not as a rule present
much difficulty. When moderately sound the instrument shown in fig. 17
may be used, but in those instances where the root is much decayed, and
lies well below the gum margin, a rather finer pair will be found more
serviceable. The manner of removal is similar to that used when the
crown is standing.
[Illustration: FIG. 17.]
(_b_) =Upper Canines.=--These teeth, like the incisors, are single rooted,
but the difference between the curve of the anterior and posterior
surfaces is greater. The roots too are much longer, more firmly
implanted, and hence require more force in their removal. Forceps
similar in pattern to those used for incisors may be used, the severance
of the tooth from its attachments being brought about by force applied
in an inward, followed by an outward, direction. The root being more or
less three sided, rotation cannot well be adopted.
The roots of canine teeth are to be removed in the same manner as that
adopted for the whole tooth.
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